rb_iseq_first_lineno 1074 iseq.c             return rb_iseq_first_lineno(iseqw_check(self));
rb_iseq_first_lineno  119 iseq.h         VALUE rb_iseq_first_lineno(const rb_iseq_t *iseq);
rb_iseq_first_lineno 1023 proc.c         	loc[1] = rb_iseq_first_lineno(iseq);
rb_iseq_first_lineno 1169 proc.c         	    first_lineno = FIX2INT(rb_iseq_first_lineno(iseq));
rb_iseq_first_lineno 2695 proc.c         	bind->first_lineno = FIX2INT(rb_iseq_first_lineno(iseq));
rb_iseq_first_lineno 1337 vm_backtrace.c     return iseq ? rb_iseq_first_lineno(iseq) : Qnil;
rb_iseq_first_lineno  562 vm_method.c    		int line = iseq->body->line_info_table ? FIX2INT(rb_iseq_first_lineno(iseq)) : 0;